ChemicalBook CAS DataBase List 1-ISOPROPYLHYDRAZINE

1-ISOPROPYLHYDRAZINE synthesis

12synthesis methods

Product Name:1-ISOPROPYLHYDRAZINE
CAS Number:2257-52-5
Molecular formula:C3H10N2
Molecular Weight:74.12

67-63-0 Synthesis

67-63-0
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Yield: 95.7%

Reaction Conditions:

with hydrogenchloride;hydrazine hydrate in water; pH=6.5 - 7 at 30 - 115; under 4500.45 Torr; for 2.5 h;Large scale;Temperature;Pressure;

Steps:

2 Example 2
470g of hydrazine hydrate with a concentration of 80% is put into a salt-forming kettle,Turn on stirringControl temperature is 30 ,Then 912 g of 30% hydrochloric acid was added dropwise,Adjust the PH to 6.5 ~ 7.0,After the reaction is completed,Heating temperature to 80 ,Decompression dehydration,Control the degree of vacuum 0.1MPa,Hydrazine hydrochloride;The resulting hydrazine hydrochloride as a catalyst into the isopropyl hydrazine reactor,Then add 1725g of 96% isopropyl alcohol,Then closed reactor,Heated to 115 reaction,Control the reaction pressure is 0.6MPa,Reaction 2.5h,After the reaction was cooled to 55 ° C,Into the distillation kettle steamed out isopropanol,Was isopropyl hydrazine hydrochloride solution;The isopropyl hydrazine hydrochloride solution obtained above was transferred to a free kettle,And added 562g concentration of 80% hydrazine hydrate for free,The free mixture is drawn into a still pot,Vacuum distillation of isopropyl hydrazine crude product and the substrate hydrazine hydrate;The substrate of the hydrazine hydrate into isopropyl hydrazine reaction step,The crude isopropyl hydrazine was sent to the liquid - liquid separator,Isopropylhydrazine (organic phase) is separated from the aqueous phase.The water phase into the free process,Isopropyl hydrazine (organic phase) into the refining tank,Cleaned with pure water and then sent to the liquid - liquid separator isopropyl hydrazine and water separation,That was isopropyl hydrazine finished,Yield 95.7%.

References:

Chongqing Jinshan Technology Co., Ltd.;Li Yashan CN105017064, 2017, B Location in patent:Paragraph 0017; 0018; 0019; 0020; 0021; 0022